23555452440 has 64 divisors (see below), whose sum is σ = 76102236000. Its totient is φ = 5798264832.

The previous prime is 23555452429. The next prime is 23555452441. The reversal of 23555452440 is 4425455532.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (23555452441) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7548265 + ... + 7551384.

Almost surely, 2^23555452440 is an apocalyptic number.

23555452440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

23555452440 is an abundant number, since it is smaller than the sum of its proper divisors (52546783560).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

23555452440 is a wasteful number, since it uses less digits than its factorization.

23555452440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15099676 (or 15099672 counting only the distinct ones).

The product of its (nonzero) digits is 480000, while the sum is 39.

The spelling of 23555452440 in words is "twenty-three billion, five hundred fifty-five million, four hundred fifty-two thousand, four hundred forty".